TRUMP: I will 'probably' sue because Ted Cruz cheated in Iowa

Republican presidential candidate Donald Trump at a campaign rally in Milford. Thomson Reuters After accusing his Republican presidential rival Sen. Ted Cruz of Texas of illegally stealing a win from the Iowa caucuses, Donald Trump said Wednesday that he would "probably" sue over the results of the vote.

When asked whether he would file a formal complaint over the caucuses' results, Trump said, "Probably."

"What he did is unthinkable," Trump said, later calling Cruz a "really fraudulent" character.

Earlier in the day, Trump fired off a raging tweetstorm accusing Cruz of cheating in Iowa. Trump even suggested the Republican Party take the unprecedented step of holding a do-over election in Iowa or nullifying Cruz's results.

Trump's claims of fraud center on the actions of Cruz allies on the night of Monday's Iowa caucuses.

A third Republican candidate, Ben Carson, had reportedly signaled that he was going to speak early that night in order to fly home to Florida and rest. This was a somewhat unusual declaration, as most candidates were planning to rush to the next voting states.

Some Cruz supporters quickly speculated that Carson was about to leave the race. Rep. Steve King (R-Iowa), a prominent Cruz surrogate, wrote on Twitter: "Carson looks like he is out. Iowans need to know before they vote. Most will go to Cruz, I hope."

Cruz later apologized to Carson and said his team should have circulated Carson's statement denying the rumors.

The Texas senator ultimately won the caucuses even though Trump had been leading polls for weeks before the voting started. In his Wednesday interview with Boston Herald Radio, posted by BuzzFeed, Trump blamed his loss on Cruz's picking up voters who thought Carson had dropped out.

"It's a total voter fraud when you think of it, and he picked up a lot of those votes and that's why the polls were so wrong, because of that," Trump said. "I couldn't understand why the polls were wrong."

Trump also called Cruz a "nasty guy" and said "nobody likes him," noting that Cruz's colleagues in the Senate had not endorsed him for president.

Cruz's campaign eventually repsonded, suggesting that Trump check in to a "Twitter addiction therapy group."